What does f-number mean?

Definitions for f-number
ˈɛfˌnʌm bərf-number

This dictionary definitions page includes all the possible meanings, example usage and translations of the word f-number.


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Wiktionary

  1. f-numbernoun

    The ratio of the focal length of a lens to its diameter; a measure of the light-gathering ability of the lens.

Wikipedia

  1. F-number

    In optics, the f-number of an optical system such as a camera lens is the ratio of the system's focal length to the diameter of the entrance pupil ("clear aperture"). It is also known as the focal ratio, f-ratio, or f-stop, and is very important in photography. It is a dimensionless number that is a quantitative measure of lens speed; increasing the f-number is referred to as stopping down. The f-number is commonly indicated using a lower-case hooked f with the format f/N, where N is the f-number. The f-number is the reciprocal of the relative aperture (the aperture diameter divided by focal length).

Wikidata

  1. F-number

    In optics, the f-number of an optical system is the ratio of the lens's focal length to the diameter of the entrance pupil. It is a dimensionless number that is a quantitative measure of lens speed, and an important concept in photography.

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Numerology

  1. Chaldean Numerology

    The numerical value of f-number in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of f-number in Pythagorean Numerology is: 7

Examples of f-number in a Sentence

  1. Steven Orzack:

    Overall, more females die during pregnancy than do males. So that's why there's an excess number of males at birth.

  2. Dinesh Thakur:

    An overwhelming number of non-standard-quality drugs are not prosecuted in criminal cases, since state drug controllers only impose minor administrative penalties on the offenders.

  3. Paul Mango:

    What we are really looking for is cases -- the number of positive cases from both the placebo and the vaccine group, once we get to 150 or so, statistically that is significant regardless of how many enrollees we have in the trial.

  4. The Twitter spokesperson:

    These relationships are longstanding and go beyond any one event, our consistent collaboration with law enforcement and government partners spans a number of issues, including the propagation of violent activity, attempts at platform manipulation, election integrity issues, and more.

  5. Chuck Wexler:

    At end of day, what you have is an enormous number of guns on the street and you have a concern about how to prevent the next shooting or homicide, that's how police chiefs are thinking about this.


Translations for f-number

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"f-number." Definitions.net. STANDS4 LLC, 2024. Web. 19 Mar. 2024. <https://www.definitions.net/definition/f-number>.

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